A manhunt is underway in northwest Ohio for a subject wanted in an armed robbery that occurred in Liberty Center Sunday night.Just before 9pm last night, a black male subject entered the Liberty Main Stop along route 109 on the north side of the village.The suspect brandished a gun, and demanded money.He fled with an undisclosed amount of cash, heading northbound on route 109 in a silver colored Dodge charger.There is no further description of the suspect in this case.